QHostInfo::lookupHost alternative with modern connect syntax

QHostInfo::lookupHost does only work with the "old" way of connecting to slots.

It would be nice to also have more overloads of this function with the possibility to use the new connection-syntax as well as to be able to use lambdas, to enable compile-time checking on the connection. Similar to the QTimer::singleShot-functions introduced in 5.4.